Lennox furnace nomenclature

safety codes. Cooling system has been rated in the Lennox environ-mental test room in accordance with ARI Standard 210/240-89. In addition, unit has been sound rated in the Lennox reverberant sound test room in accordance with ARI Standard 270-84. All -50 & -75 gas input models meet California Nitrogen Oxides (NOx) standards and

Lennox furnace nomenclature. A British Thermal Unit (Btu) is a measurement of heat energy. One Btu is the amount of heat required to raise one pound of water by one degree Fahrenheit. Btus per hour (Btuh) is the benchmark used to estimate the capacity of heating systems, such as gas furnaces. Lennox® furnaces are available in heating capacities ranging from 30,000 to ...

You can find the model and serial numbers (M/N and S/N) for your furnace by removing the top-front service panel and looking to the left side of the interior cabinet or the top of the blower deck, depending on whether your system is an 80% or 90% AFUE unit. Also, the orientation (horizontal or vertical) and flow direction (down or up) of your ...

CREDITS & REBATES 1. 1 Lennox Industries Inc. ( " Lennox " ) is not acting in the capacity of a legal or tax advisor and does not make any representation, warranty, guarantee or other assurance as to whether a particular matchup qualifies or is eligible for a tax credit or rebate. This document has been prepared for informational purposes only ...Explanation. Oil furnace horizontal Direct drive blower, generally for both heating and cooling Stowaway unit (horizontal flow) Two meanings: 1) Expansion valve system for cooling units or 2) Vitreous coated heat exchanger on gas furnace Two meanings: 1) Water coil or 2) Wide cabinet Adapter frame Air cooled condenser Air module-hydronic heat ...Created Date: 7/27/2001 3:02:39 PM41.5 hp motor is required with the ZA05 and ZA06 drive kits. Raider®Packaged Gas / Electric 3 to 6 Tons / Page 14. SPECIFICATIONS BELT DRIVE MODELS - 6 TON. General Data Nominal Tonnage 6 Ton 6 Ton Model No. ZGB074S4B ZGB074S4T. Efficiency TypeStandard Standard Blower TypeSingle Speed Belt Drive Two Speed Belt Drive.How It Works. Understanding how a home comfort system works starts with knowing what it is and what it consists of. A home comfort system, also called an HVAC system or a split system, has four parts: Indoor unit, such as a furnace or air handler. Outdoor unit, either an air conditioner or a heat pump. Thermostat.Lennox, 20-25 year old residential air conditioner. Nomenclature reads a model # HS8-461, can anyone tell me the correct tonnage of this unit. It appears to be a 2.5 or 3 ton judging by the suction and discharge line sizes of 3/4" suction and 1/4" liquid. It definately is not a 4-ton unit if anyone is rounding the 46 in the nomencalture to a 48 signifying to most a 4-ton unit.

Integrated furnace control has one red LED to indicate status and indicate diagnostic codes. Push button recall of the last 5 diagnostic codes aids in troubleshooting. Integrated furnace control has built-in twinning capability (“TWIN” terminal on control) to operate two furnaces simultaneously without any additional controls. A field Lennox, Air Conditioner, Merit , 3 Ton, 13 SEER, 1 Stage, 208/230V, 1 Phase, 60Hz, 13ACX-036-230. Cat # : 50W03. Model/Part # : 13ACX-036-230. ... *Must be accompanied by either a variable speed air handler or furnace and the ComfortSense® 7000 Series touchscreen thermostat. OUR VISUAL SEARCH OPTION... Helps you find tools and products, fast. Lennox LF24 gas-fired, horizontal unit heaters are compact in design and easy to install. Units feature steady-state heating efficiencies of up to 80.5%. LF24 unit heaters are ideal for economical commercial heating systems. Units are shipped completely assembled with controls factory installed and wired. ML180UH Homeowner's Manual. 11/10. 506525−01. ML180UH SERIES. Litho U.S.A. 506525−01 11/2010 Supersedes 08/2010. 2010 Lennox Industries Inc. Dallas, Texas, USA. WHAT TO DO IF YOU SMELL GAS: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other ap- pliance.The gas furnace in the Lennox Merit Series is high-efficiency. They have an AFUE rating of up to 96%, which means they are some of the most efficient furnaces on the market. The gas furnaces in the Lennox Merit Series also feature a two-stage gas valve, a silicon nitride igniter, and a stainless steel heat exchanger.

Shop LennoxPro's huge selection of HVAC Lennox equipment, parts, and supplies. HVAC professionals can go online for easy ordering of Lennox products and other HVAC supplies. en. English (EN) ... Lennox is here to provide you with the support and resources to make 2025 compliant systems easy to sell, install, and service.April 28, 2022. We had the Lennox Elite Series EL296V, 2-stage, variable speed, high efficiency gas furnace installed 3 weeks ago. This unit is much more quiet than the 20 year old Rheem 90 series that it replaced. It took approximately one week for the "new burner" smell to go away. We also replaced our old manual thermostat with an EcoBee ...• A Lennox communicating thermostat must be used in communicating applications. • In non-communicating applications, the Lennox ComfortSense® thermostat may be used, as well as other non-communicating thermostats. In all cases, setup is critical to ensure proper system operation. Field wiring for both communicating and non-Designed for efficient durability. The ML14XC1 air conditioner is designed for smart energy use, and designed to last. Efficiency ratings of up to 17.00 SEER mean the ML14XC1 can reduce utility bills without any compromise in comfort. It …Lennox Furnace Model G14Q3-60-19-19 Parts. Lennox Furnace Model G14Q3-60-19-19 Parts are easily labeled on this page to help you find the correct component for your repair. Filter results by category, title and symptom. You can also view diagrams and manuals, review common problems that may help answer your questions, watch related videos, read insightful articles or use our repair help guide ...safety codes. Cooling system has been rated in the Lennox environ-mental test room in accordance with ARI Standard 210/240-89. In addition, unit has been sound rated in the Lennox reverberant sound test room in accordance with ARI Standard 270-84. All -50 & -75 gas input models meet California Nitrogen Oxides (NOx) standards and

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G24M series gas fired furnaces include eight models (natural gas or propane) with input capacities of 13.2, 17.6, 22.0, 29.3, 35.2 and 41.0 kW (45 000, 60 000, 75 000, 100 000, 120 000. Down-Flow Closet Installation With Cooling Coil. and 140 000 Btuh). Up-flow, down-flow or horizontal applications. Lennox add-on evaporator coils, electronic ...When it comes to keeping your home warm and cozy during the winter months, a reliable furnace is essential. Lennox furnaces are known for their quality and longevity, but like any ...The gas furnace in the Lennox Merit Series is high-efficiency. They have an AFUE rating of up to 96%, which means they are some of the most efficient furnaces on the market. The gas furnaces in the Lennox Merit Series also feature a two-stage gas valve, a silicon nitride igniter, and a stainless steel heat exchanger.Large Splits. Lennox offers an extensive line of split system components that provide reliable performance to meet the demands of a variety of commercial applications. Our systems offer the highest efficiency available while reducing energy bills and maximizing comfort. From heat pumps and air conditioners to high-quality air handlers and ...The date of production/manufacture or age of Allied-Commercial® HVAC equipment can be determined from the serial number located on the data plate. Parent: Lennox. Sister or similar Brands Include: AirEase® | Airease-Johnson® | Aire-flo® | Allied-Commercial® | Armstrong Air® | Concord® | Ducane® | Lennox® | Magic-Pak®.

Select Category. Subcategory. Select Subcategory. Model. Select Model. Choose Category to start your search. Find Lennox Commercial HVAC product service manuals, …Adjusting airflow based on demand gives the ML193E gas furnace a 93% AFUE* rating, up to 46% more eficient than standard motors. The ML193E gas furnace has earned the ENERGY STAR® certification in the U.S. South Region. The ML193E gas furnace comes with a 20-year limited warranty on the heat exchanger and a 5-year limited warranty on remaining ...Designed to integrate with PureAirTM S air purification system. Digitally-enabled for easy control at your fingertips. Enhanced humidity control for incomparable comfort. Dual-fuel compatible with Lennox® heat pumps for added cost savings. The Quietest And Most Efficient Furnace You Can Buy1. The Quietest Furnace In Its Class2.This appendix illuminates the coding of different manufacturer model numbers. An Amana model number is shown as an example of how manufacturers code furnace characteristics. Table G.1 shows the Amana model number "GUID045CA30.". The first row of the table shows the model number broken into eight cells. The fifth, sixth, and seventh ...Related Manuals for Lennox GCS16 Series. Gas Heater Lennox GCS16 Series Manual. 6-25 ton units (80 pages) Industrial Equipment Lennox G26 Series Installation Instructions Manual (31 pages) Industrial Equipment lennox G21Q3-40 Unit Information (100 pages)GAS FURNACES. In a natural gas or propane furnace, a pilot light ignites the source gas, igniting burners inside a combustion chamber. The generated heat then enters a heat exchanger, transferring heat to the air and raising the temperature of a space to the level set by a thermostat. Furnaces are rated by the Annual Fuel Utilization Efficiency ...Lennox® packaged rooftop units represent some of the most innovative technology in the market. Combining industry-leading efficiency with fast, easy installation and service, Lennox continues to offer reliable systems that deliver exceptional comfort in commercial buildings. A broad range of ENERGY STAR® qualified units help control energy ...You can also view G24M3-75A-2 parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model. For additional assistance, please contact our customer service number at 1-800-269-2609, 24 hours a day, seven days a week or send us a message using the live ...Award signifies that Lennox has made outstanding contributions to design energy efficient units that will lower energy bills, while meeting industry standards for comfort and indoor air quality. Lennox was the first HVAC manufacturer to win this award and has been a four−time recipient since 2003. ISO 9001 Registered Manufacturing Quality System.Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems.View and Download Lennox E12Q2-05 service information online. E12 Series. E12Q2-05 furnace pdf manual download. Also for: E12q2-10, E12q2-15, E12q3-10, E12q3-15, E12q3-20, E12q4-15, E12q4-20, E12q4-25, E12q5-15, E12q5-20, E12q5-25, E12q5-30. ... Furnace Lennox EL195UHE Elite Series Installation Instructions Manual. Elite series gas furnace ...

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Connect with Lennox. Email us or speak directly with an expert who can walk you through the benefits of partnering with a trusted company like Lennox. Lennox Commercial provides high-efficiency commercial AC and Heating rooftop units, split systems, controls, furnaces and indoor air quality products.Furnace Lennox G40DF(X) SERIES User's Information Manual Lenoxx owner's manual gas furnace g40df(x) series (6 pages) Furnace Lennox G40DF(X) Series User's Information Manual1 − Keep the furnace area clear and free of combustible material, gasoline, and other flammable vapors and liquids. If it is installed in an insulated area, the furnace must be kept free of insulating material. Insulating ma-terial may be combustible. 2 − DO NOT obstruct air flow to unit.Lennox Serial Number Nomenclature - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Lennox serial number decodingElite ® Series takes the Lennox promise of exceptional comfort and performance to the next level. This superior product family delivers remarkable efficiency. ... Pairs an electric heat pump with a gas furnace and alternates between the two fuel sources. During the coldest weather, the furnace provides efficient heat. During mild weather, the ...Hi. I have a lennox 80MGF3/4-100A-11 Furnace. After the furnace kicks on for 30 secs or so, the furnace makes a clicking sound, it never ignites, the flames goes down, and it just keeps recycling with … read moreOn average, a furnace will cycle every 10 to 20 minutes. The amount of time between cycles is dependent on a number of factors, including the outside air temperature and the temper...High-efficiency, variable speed gas furnace. The EL296UH110XV60C uses a variable speed motor that reduces electrical use by two-thirds, compared to a standard motor. Plus, two stages of heating minimize temperature swings, so homeowners can save on utility bills without sacrificing comfort. Upflow/Horizontal. Energy Efficiency. Quiet Operation ...performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier. IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be

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Cat # : 49D94. Model/Part # : CB29M-31-1P. Product Unavailable. Please call 1-877-570-0123 for more information. Print.Clever design and durable construction make Armstrong Air package units an excellent all-in-one solution, and a marvel of technology. In warmer climates, the thoughtful and efficient design of Armstrong Air air handlers mean efficiency and reliability season after season. Armstrong Air affordable heating & cooling products keep you comfortable ...Gas Furnaces. Merit®gas furnaces come appointed with: Sturdy burners reduce noise and maintain efficiency throughout the unit's life Patented clamshell design reduces air leakage from the unit, sending more heated air to the home Additional design elements, like pre-cut holes, pre-bent flanges, and factory installed flue collars, make the ...How to determine the date of production/manufacture or age of Rheem® brand HVAC Systems. The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary from as little ...Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems.A smarter system. When this furnace is installed with a compatible Lennox heat pump, it creates a heating system that can switch back and forth between gas and electricity automatically, based on whichever is most cost-efficient for the weather conditions at the time.WARNING! Coil Cabinet Wider Than Furnace Cabinet (Supply Air Openings Match) CR33−48B−F 20 (508) 17-1/2 (446) 21 (533) 17-1/2 (446) NOTE − Due to Lennox' ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability.Ducane Product Literature. The more information you have about your new purchase, the more confident you'll be that Ducane™ is the right choice. Right now. Perhaps you'd like to know more about the products you're considering. Maybe you'd like to read up on the equipment you've just purchased. Either way, Ducane has an extensive ... ….

Learn how to identify the series, tonnage, and power characteristics of Lennox furnaces and other HVAC products using the model number. See examples of Le…Related Manuals for Lennox GCS16 Series. Industrial Equipment Lennox GCS16 Series Manual (134 pages) Gas Heater Lennox Shadowdance LSVFSD-18 Installation And Operation Instructions Manual. Shadowdance series vent-free millivolt dual-listed gas log sets (20 pages)Are you in need of replacement parts for your Lennox furnace? Finding the right parts can be a challenge, especially if you don’t know where to start. Fortunately, using the model ...The Power Saver™ constant torque motor in the ML180E adjusts airspeed based on demand, which means that it operates more efficiently than a standard motor. Energy-Efficient Design - With an energy rating of 80% AFUE, the ML180E keeps your home comfortable and energy efficient. Dual-fuel operation - When the ML180E is paired with a Lennox ...10 years on compressor. 20 years or Limited Lifetime on heat exchanger (depending upon model) Lennox Merit ® Series products. 5 years on covered components. 5 years on compressor. 20 years on heat exchanger. Healthy Climate ® Indoor Air Quality Systems. 2 or 5 years on covered components (depending upon model)The CHX35 family of coils are designed with aluminum tube construction which provides great heat transfer and additional resistance to environmental contaminants. Durable components, such as corrosion-resistant casing and drain pans, help guard against unexpected service calls. CHX35-51/61C-6F-1 coil is built to high standards and is backed by ...13ACX Air Conditioner. Economical, environmentally responsible home cooling. Even in the hottest summer months, the 13ACXN036-230 works efficiently to enhance your customers' comfort. Compared to an older system, this air conditioner can help them save significantly on their monthly cooling bills. NORTH REGION. Energy Efficiency. Quiet Operation.Product Catalog. HVAC. Furnaces. Gas Furnaces. Lennox Merit ML196E, ML196UH045XE24B, 96% AFUE, 44000 BTU, 2 Ton, 1 Stage Heat, Constant Torque … Lennox furnace nomenclature, 50HZ T−Class Packaged Gas / Electric − 26 to 44 kW / Page 4. FEATURES AND BENEFITS. CONTROLS. Unit Controller Solid−state microprocessor−based control board that provides flexible control of cooling functions. All control voltage is provided via a 24V (secondary) transformer with built−in circuit breaker protection., Integrated furnace control has one red LED to indicate status and indicate diagnostic codes. Push button recall of the last 5 diagnostic codes aids in troubleshooting. Integrated furnace control has built-in twinning capability (“TWIN” terminal on control) to operate two furnaces simultaneously without any additional controls. A field, How to determine the date of production/manufacture or age of American Standard® brand HVAC Systems. The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary ..., Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems., Explanation. Oil furnace horizontal Direct drive blower, generally for both heating and cooling Stowaway unit (horizontal flow) Two meanings: 1) Expansion valve system for cooling units or 2) Vitreous coated heat exchanger on gas furnace Two meanings: 1) Water coil or 2) Wide cabinet Adapter frame Air cooled condenser Air module-hydronic heat ..., The Lennox CB29M and CB30M Elite® series blower coil units are designed for installation with a matched remote outdoor unit and optional field−installed electric heat. The blower coil units are for indoor installation only. The CB29M and CB30M units, designed for multi−position-al installations, are completely assembled at the factory, determine nominal airflow capacity. Manufacturers often code furnace specifications into their model numbers. This appendix illuminates the furnace specifications from manufacturer model numbers. An Amana model number is as an example of how manufacturers code furnace characteristics. Table 7.2.1 shows the Amana model number "GUID045CA30.", Units shipped completely factory assembled and wired. ELS180S4DS1Y AC/15TON/230-3. Quiet and Efficient Operation - Scroll compressor provides smooth, efficient and quiet operation. Outdoor coil fan moves large volumes of air uniformly through the entire condenser coil. Copper tube/enhanced lanced fin coil provide maximum exposure of fin ..., Applications. Lennox designed evaporator coils install with most Lennox up-flow furnaces. Applicable to expansion valve systems. C26–41 and C26–51/65 available in both standard and narrow (N) widths. See condensing units bulletins (section Cooling Units – Condensing Units) for evaporator unit applications and cooling capacities., The ML196E gas furnace comes with a 20-year limited warranty on the heat exchanger and a 5-year limited warranty on remaining covered components.**. * AFUE, or Annual Fuel Utilization Efficiency, is a measure of how much usable heat is generated when natural gas is burned in the unit. The higher the AFUE, the more heat you'll get from your ..., Buying a mobile home can be a great investment for some. The option of designing your own living space, having it built and shipped to you is a big attraction. It can also be more ..., With the help of the Lennox S40 Smart Thermostat ultra smart thermostat, the SLP99V gas furnace unlocks a world of connectivity. It stays finely tuned to your home by using sensors to react, diagnose, and troubleshoot—all while remaining in constant contact with your dealer to ensure proactive responses. Geofencing technology ensures your air ..., SL280UHV(X) series units are 80% efficiency gas furnaces used for upflow or horizontal applications only, manufac-tured with Lennox Duralok heat exchangers formed of aluminized steel. SL280UHV(X) units are available in heat-ing capacities of 66,000 to 132,000 Btuh and cooling ap-, Are you in need of replacement parts for your Lennox furnace? Finding the right parts can be a challenge, especially if you don’t know where to start. Fortunately, using the model ..., 11. ®Lennox CORE Control System 12. Economizer (option) 13. Humiditrol™+ Dehumidification System (option) CONTENTS The Model L™ packaged rooftop line is engineered with advanced variable speed technology to offer some of the highest energy efficiencies in the industry while delivering superior temperature and humidity control in a wide ..., Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems., The Lennox CB29M and CB30M Elite® series blower coil units are designed for installation with a matched remote outdoor unit and optional field−installed electric heat. The blower coil units are for indoor installation only. The CB29M and CB30M units, designed for multi−position-al installations, are completely assembled at the factory, Makes your air feel great, even in the summer. The EL296E also has the power to make your home feel better during summer months. By operating at its lower speed, air spends more time in contact with the outside coil, the cooling engine of your air-conditioning unit. This helps reduce moisture levels inside your home to enhance your comfort., What Is Lennox Serial Number Nomenclature? Lennox furnaces have a serial number that indicates the model, year of manufacture, and date of manufacture. For example, a furnace with the serial number D341209-878 would be a 34SEP09 manufactured on Sept. 12th, 2009. , Paris is the capital and most populous city of France.With an official estimated population of 2,102,650 residents as of 1 January 2023 in an area of more than 105 km 2 (41 sq mi), Paris is the fourth-most populated city in the European Union and the 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance ..., When it comes to maintaining and repairing your Lennox furnace, one of the most important things you can do is order the correct parts. This ensures that your furnace operates effi..., multi-position 33" natural gas furnaces (style a) includes lo-nox models tgls supersedes: 035-21389-001 rev. k (0410) 035-21389-001 rev. l (0610) www.source1parts.com hvac service parts 1 of 6 figure 1: 80% single stage multi-postion natural gas furnaces fig item description tg8s040a08mp11a tg8s060a10mp11a tg8s060a12mp11a tg8s080b12mp11a, Lennox Price Book for a complete list of thermostats. CABINET Conditioned areas insulated with foil faced insulation to minimize heat loss and reduce operating sound levels. Powder paint for maximum durability. Easy service access. PVC (polyvinyl chloride) coated steel wire guard provides complete coil protection., The cost of running an electric furnace varies depending on size of home, the type of furnace, cost of electricity and weather conditions. Generally, an electric furnace runs from ..., Electric Heat • • • • •, Parent Company - Lennox. ... HVAC professionals, Facilities Managers, HOA's, etc.., in determining the date of manufacture and/or age of HVAC equipment to determine the expected useful life (EUL). This web site should not be relied upon for commercial use or interpretations. Accuracy and reliability of the information provided is believed ..., GAS FURNACES ML193UH MERIT® SERIES Upflow / Horizontal Bulletin No. 210588 March 2019 Supersedes September 2018 AFUE - 93% Input - 44,000 to 132,000 Btuh ... Approved for all Lennox 90% furnaces. Termination Kits Facilitates installation of combustion air intake pipe and flue exhaust pipe., How to determine the date of production/manufacture or age of Rheem® brand HVAC Systems. The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary from as little ..., Solar. SunSource® Commercial Energy System5. Factory. Field. Visit us at www.lennox.com For the latest technical information, www.lennoxcommercial.com Contact us at 1-800-4-LENNOX ©2019 Lennox Industries, Inc. (14G47) 2/19 PC92164. 92164_energence_RTU_qr_guide.indd 2. 3/4/19 9:30 AM., Created Date: 5/14/2002 3:16:17 PM, Lennox® SL297NV ultra low emission gas furnace family produce 65% lower NOx emissions than standard low NOx furnaces. With an efficiency rating of up to 97.5% the SL297UH040NV36B gas furances can potentially save hundreds of dollars per year in engery costs. This product has been designated as one of the Most Efficient ENERGY STAR qualified ..., Gas Furnaces MODEL NUMBER IDENTIFICATION GUIDE A190043 N 92 E S N 040 14 10 A C = Constant Airflow Variable-Speed ECM E = Fixed-Speeds, Constant Torque (FCT) ECM P = PSC V = Variable Speed, Constant Torque (VCT) ECM 026 = 26,000 BTU/h 040 = 40,000 BTU/h 045 = 45,000 BTU/h..... 155 = 155,000 BTU/h 80 - 80% AFUE 92 - 92% AFUE 95 - 95% AFUE 96 ..., Lennox Merit ML180E, ML180UH045E36A, 80% AFUE, 44000 BTU, 3 Ton, 1 Stage Heat, Constant Torque Upflow/Horizontal Gas Furnace. Cat # : 81W21. Model/Part # : ML180UH045E36A